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公开(公告)号：US20050208901A1
公开(公告)日：2005-09-22
申请号：US10852470
申请日：2004-05-24
申请人： Janice Chiu , Shahla Khorram , Qiang (Tom) Li
发明人： Janice Chiu , Shahla Khorram , Qiang (Tom) Li
摘要： A transceiver front end includes a transmit/receive (T/R) switch, a first balun, a second balun, a low noise amplifier, a power amplifier, and compensation circuitry. The T/R switch is operably coupled to an antenna for receiving inbound radio frequency (RF) signals and for transmitting outbound RF signals. The first balun includes a single ended winding and a differential winding, where the single ended winding is operably coupled to the T/R switch. The second balun includes a single ended winding and a differential winding, where the single ended winding is operably coupled to the T/R switch. The low noise amplifier is operably coupled the differential winding of the first balun. The power amplifier is operably coupled to the differential winding of the second balun. The compensation circuitry is operably coupled to the first balun to compensate for at least one of phase imbalance, amplitude imbalance, and impedance imbalance of the first balun.
摘要翻译： 收发器前端包括发射/接收（T / R）开关，第一平衡 - 不平衡转换器，第二平衡 - 不平衡转换器，低噪声放大器，功率放大器和补偿电路。 T / R开关可操作地耦合到天线，用于接收入站射频（RF）信号和用于发送出站RF信号。 第一个平衡 - 不平衡变压器包括单端绕组和差动绕组，其中单端绕组可操作地耦合到T / R开关。 第二平衡 - 不平衡变压器包括单端绕组和差动绕组，其中单端绕组可操作地耦合到T / R开关。 低噪声放大器可操作地耦合第一平衡 - 不平衡变换器的差动绕组。 功率放大器可操作地耦合到第二巴伦的差动绕组。 补偿电路可操作地耦合到第一平衡 - 不平衡变换器，以补偿第一平衡 - 不平衡变换器的相位不平衡，幅度不平衡和阻抗不平衡中的至少一个。
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公开(公告)号：US07269391B2
公开(公告)日：2007-09-11
申请号：US10852470
申请日：2004-05-24
申请人： Janice Chiu , Shahla Khorram , Qiang (Tom) Li
发明人： Janice Chiu , Shahla Khorram , Qiang (Tom) Li
IPC分类号： H04B1/44
摘要： A transceiver front end includes a transmit/receive (T/R) switch, a first balun, a second balun, a low noise amplifier, a power amplifier, and compensation circuitry. The T/R switch is operably coupled to an antenna for receiving inbound radio frequency (RF) signals and for transmitting outbound RF signals. The first balun includes a single ended winding and a differential winding, where the single ended winding is operably coupled to the T/R switch. The second balun includes a single ended winding and a differential winding, where the single ended winding is operably coupled to the T/R switch. The low noise amplifier is operably coupled the differential winding of the first balun. The power amplifier is operably coupled to the differential winding of the second balun. The compensation circuitry is operably coupled to the first balun to compensate for at least one of phase imbalance, amplitude imbalance, and impedance imbalance of the first balun.
摘要翻译： 收发器前端包括发射/接收（T / R）开关，第一平衡 - 不平衡转换器，第二平衡 - 不平衡转换器，低噪声放大器，功率放大器和补偿电路。 T / R开关可操作地耦合到天线，用于接收入站射频（RF）信号和用于发送出站RF信号。 第一个平衡 - 不平衡变压器包括单端绕组和差动绕组，其中单端绕组可操作地耦合到T / R开关。 第二平衡 - 不平衡变压器包括单端绕组和差动绕组，其中单端绕组可操作地耦合到T / R开关。 低噪声放大器可操作地耦合第一平衡 - 不平衡变换器的差动绕组。 功率放大器可操作地耦合到第二巴伦的差动绕组。 补偿电路可操作地耦合到第一平衡 - 不平衡变换器，以补偿第一平衡 - 不平衡变换器的相位不平衡，幅度不平衡和阻抗不平衡中的至少一个。
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公开(公告)号：US20060158241A1
公开(公告)日：2006-07-20
申请号：US11384515
申请日：2006-03-21
申请人： Janice Chiu , Hooman Darabi
发明人： Janice Chiu , Hooman Darabi
IPC分类号： G06F7/44
CPC分类号： H04L27/0002 , H03D7/1441 , H03D7/1458 , H03D7/1475 , H03D2200/0084
摘要： A receiver and receiver front end having multiple independent differential inputs, multiple independent differential low-noise amplifiers, and two sets of double-balanced IQ mixers. The double-balanced mixers include cross-coupled PMOS devices that dynamically inject current at zero-crossing points to cancel out tail currents in the mixers. Also, methods of operating the above-discussed receiver and receiver front end.
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公开(公告)号：US07046068B2
公开(公告)日：2006-05-16
申请号：US10832237
申请日：2004-04-27
申请人： Janice Chiu , Hooman Darabi
发明人： Janice Chiu , Hooman Darabi
IPC分类号： G06F7/44
CPC分类号： H04L27/0002 , H03D7/1441 , H03D7/1458 , H03D7/1475 , H03D2200/0084
摘要： A receiver and receiver front end having multiple independent differential inputs, multiple independent differential low-noise amplifiers, and two sets of double-balanced IQ mixers. The double-balanced mixers include cross-coupled PMOS devices that dynamically inject current at zero-crossing points to cancel out tail currents in the mixers. Also, methods of operating the above-discussed receiver and receiver front end.
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公开(公告)号：US20050212600A1
公开(公告)日：2005-09-29
申请号：US10806139
申请日：2004-03-23
申请人： Janice Chiu
发明人： Janice Chiu
CPC分类号： H03G3/3052 , H03G3/3068
摘要： A circuit is provided for controlling the gain of an amplifier, such as an amplifier that may be used in telecommunication devices. The circuit includes an analog portion that receives signals from one or more mixers and that produces an output that is an inverse logarithmic function of the input signal. The output signal is digitally processed by a digital portion of the circuit, which determines whether gain of the amplifier should be increased, decreased, or held constant. Also, methods are provided for controlling the gain of an amplifier.
摘要翻译： 提供用于控制放大器的增益的电路，例如可以在电信设备中使用的放大器。 该电路包括从一个或多个混频器接收信号并产生作为输入信号的反对数函数的输出的模拟部分。 输出信号由电路的数字部分进行数字处理，其确定放大器的增益是否应当增加，减小或保持恒定。 此外，提供了用于控制放大器的增益的方法。
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6.发明授权公开(公告)号：US08466750B2
公开(公告)日：2013-06-18
申请号：US13170040
申请日：2011-06-27
申请人： Janice Chiu , Hooman Darabi , Tom (Qiang) Li , Shrlung Chen
发明人： Janice Chiu , Hooman Darabi , Tom (Qiang) Li , Shrlung Chen
CPC分类号： H03B5/1228 , H03B5/04 , H03B5/1215 , H03B5/1243 , H03B5/1265 , H03L1/022 , H03L1/023 , H03L7/099 , H03L7/183
摘要： A technique to use an auxiliary varactor coupled to a tuning varactor, in which a temperature compensated bias signal adjusts a bias on the auxiliary varactor to maintain a voltage controlled oscillator (VCO) from drifting in frequency as operating temperature for the VCO changes.
摘要翻译： 一种使用耦合到调谐变容二极管的辅助变容二极管的技术，其中温度补偿偏置信号调节辅助变容二极管上的偏置，以保持压控振荡器（VCO）在频率上漂移，因为VCO的工作温度变化。
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公开(公告)号：US07315192B2
公开(公告)日：2008-01-01
申请号：US11384515
申请日：2006-03-21
申请人： Janice Chiu , Hooman Darabi
发明人： Janice Chiu , Hooman Darabi
IPC分类号： G06F7/44
CPC分类号： H04L27/0002 , H03D7/1441 , H03D7/1458 , H03D7/1475 , H03D2200/0084
摘要： A receiver and receiver front end having multiple independent differential inputs, multiple independent differential low-noise amplifiers, and two sets of double-balanced IQ mixers. The double-balanced mixers include cross-coupled PMOS devices that dynamically inject current at zero-crossing points to cancel out tail currents in the mixers. Also, methods of operating the above-discussed receiver and receiver front end.
摘要翻译： 具有多个独立差分输入的接收器和接收器前端，多个独立的差分低噪声放大器和两组双平衡IQ混频器。 双平衡混频器包括跨耦合PMOS器件，其在过零点动态地注入电流以抵消混频器中的尾电流。 另外，操作上述接收机和接收机前端的方法。
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公开(公告)号：US07133655B2
公开(公告)日：2006-11-07
申请号：US10806140
申请日：2004-03-23
申请人： Janice Chiu
发明人： Janice Chiu
IPC分类号： H04B17/00
CPC分类号： H04B17/318 , H03F2203/45654 , H04W52/52
摘要： A signal strength indicator circuit that includes a first amplifier configured to receive a first input signal from a first mixer and a second input signal from a second mixer;. The circuit also includes a second amplifier configured to receive a first set of differential inputs from the first amplifier. The circuit further includes a third amplifier configured to receive a second set of differential inputs from the second amplifier stage. Even further, the circuit includes an output port for emitting an output signal that is a rectified combination of the first input signal and the second input signal. Also, a method of processing signals input into a signal strength indicator circuit.
摘要翻译： 信号强度指示器电路，其包括被配置为从第一混频器接收第一输入信号的第一放大器和来自第二混频器的第二输入信号。 电路还包括配置成从第一放大器接收第一组差分输入的第二放大器。 电路还包括配置成从第二放大器级接收第二组差分输入的第三放大器。 另外，该电路包括用于发射作为第一输入信号和第二输入信号的整流组合的输出信号的输出端口。 另外，处理输入信号强度指示电路的信号的方法。
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公开(公告)号：US20120326795A1
公开(公告)日：2012-12-27
申请号：US13170106
申请日：2011-06-27
申请人： Janice Chiu , Srinivas Badam
发明人： Janice Chiu , Srinivas Badam
摘要： A technique to use a two-step calibration procedure to calibrate a voltage controlled oscillator (VCO) of a phase-locked loop. The first calibration step is an open-loop calibration procedure in which a control voltage of the VCO is temperature compensated and the VCO is tuned using a search routine to generate a corresponding output frequency based on the control voltage. The second step is a closed-loop calibration procedure to adjust the tuning components of the VCO to correct for a 1 LSB error.
摘要翻译： 一种使用两步校准程序来校准锁相环的压控振荡器（VCO）的技术。 第一校准步骤是开环校准程序，其中VCO的控制电压被温度补偿，并且使用搜索程序调谐VCO，以基于控制电压产生相应的输出频率。 第二步是闭环校准程序，以调整VCO的调谐组件，以校正1 LSB误差。
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公开(公告)号：US07532055B2
公开(公告)日：2009-05-12
申请号：US11980463
申请日：2007-10-31
申请人： Janice Chiu , Hooman Darabi
发明人： Janice Chiu , Hooman Darabi
IPC分类号： G04F7/44
CPC分类号： H04L27/0002 , H03D7/1441 , H03D7/1458 , H03D7/1475 , H03D2200/0084
摘要： A receiver and receiver front end having multiple independent differential inputs, multiple independent differential low-noise amplifiers, and two sets of double-balanced IQ mixers. The double-balanced mixers include cross-coupled PMOS devices that dynamically inject current at zero-crossing points to cancel out tail currents in the mixers. Also, methods of operating the above-discussed receiver and receiver front end.
摘要翻译： 具有多个独立差分输入的接收器和接收器前端，多个独立的差分低噪声放大器和两组双平衡IQ混频器。 双平衡混频器包括跨耦合PMOS器件，其在过零点动态地注入电流以抵消混频器中的尾电流。 另外，操作上述接收机和接收机前端的方法。
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